Going to UK and EU countries for Family trip

Hello,

I am planning to go to UK and france this summer with my parents for family visit. My parents have uk visa already but mine got expired. I already have the visa for EU countries. I am planning to apply for UK visit visa on base of sponsor from my sister. My scenario is that i am currently studying in my home country and also doing part time work. My father is retired but is financially sound and he is supporting for my trip expenses i.e tickets. I am applying on basis of my studies only by taking letter of uni confirming my enrollment. As income from my part time job is low around 200 pounds per months.
Also i have previous refusal as well from us one for visit visa and one for study visa. However, i have visited uk and eu countries couple of time before for family visit.

I want to know what are chance of my case, i will attached bank statements, tax return and covering letter from my father that he will support me during my visit.

Looking forward for some useful comments.

Thanks